Laboratory Selection Experiments with Fruit Flies Have Demonstrated That

question 90

Multiple Choice

Laboratory selection experiments with fruit flies have demonstrated that

• A) bristle number is not genetically controlled.
• B) bristle number is not genetically controlled, but changes in bristle number are caused by the environment in which the fly is raised.
• C) bristle number is genetically controlled, but there is little variation on which natural selection can act.
• D) bristle number is genetically controlled, but selection cannot result in flies having more bristles than any individual in the original population had.
• E) bristle number is genetically controlled, and selection can result in flies having more, or fewer, bristles than any individual in the original population had.

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